(x)(x*4)=900

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Solution for (x)(x*4)=900 equation: 


Simplifying
(x)(x * 4) = 900

Reorder the terms for easier multiplication:
x(4x) = 900

Remove parenthesis around (4x)
x * 4x = 900

Reorder the terms for easier multiplication:
4x * x = 900

Multiply x * x
4x2 = 900

Solving
4x2 = 900

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Divide each side by '4'.
x2 = 225

Simplifying
x2 = 225

Take the square root of each side:
x = {-15, 15}

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